Table 1.
Summary of drinking and heathy control subjects from the HCP subsample.
| Variables | HC | BD-AUD | BD + AUD |
|---|---|---|---|
| Number of subjects | 144 | 61 | 88 |
| Age (SD) | 28.8 (4.1) | 27.5 (3.8) | 28.2 (3.2) |
| Sex: Female * | 86 (59.7%) | 25 (41.0%) | 20 (22.7%) |
| Race: White * | 87 (60.4%) | 42 (68.9%) | 77 (87.5%) |
| Household income (<$50,000) | 61 (42.4%) | 26 (42.6%) | 34 (38.6%) |
| Education (<16 years) | 64 (44.4%) | 27 (44.3%) | 41 (46.6%) |
| Handedness (SD) | 69.6 (40.1) | 63.0 (45.0) | 61.4 (43.7) |
| Intelligence: PMAT score (SD) | 16.9 (4.8) | 16.0 (4.9) | 17.2 (4.5) |
| Total intracranial volume cm3 (SD) * | 1561.2 (197.7) | 1590.5 (197.0) | 1671.0 (154.4) |
| Zygosity | |||
| Individual subjects | 85 (59.0%) | 36 (59.0%) | 57 (64.8%) |
| Dizygotic twins | 30 (20.8%) | 9 (14.8%) | 16 (18.2%) |
| Monozygostic twins | 29 (20.1%) | 16 (26.2%) | 15 (17.0%) |
| Family history of drug or alcohol use | 22 (15.3%) | 9 (14.8%) | 20 (22.7%) |
| Age of first alcohol use (SD) * | 20.3 (2.8) | 17.1 (2.5) | 16.0 (1.9) |
| BD Frequency in past 12-month* | |||
| >3 days/week | 0 (0.0%) | 3 (4.9%) | 10 (11.4%) |
| 1–3 days/week | 0 (0.0%) | 58 (95.1%) | 78 (88.6%) |
| 1–3 days/month | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) |
| 1–11 days/year | 22 (15.3%) | 0 (0.0%) | 0 (0.0%) |
| Never | 122 (84.7%) | 0 (0.0%) | 0 (0.0%) |
HC, healthy controls; BD, binge drinking; BD-AUD, BD without AUD, BD + AUD, BD with AUD. PMAT24, Raven’s Progressive Matrices. SD, standard deviation. * indicates a significant difference at p < 0.05 level (without multiple comparison adjustment).